Improved beick machine



v@other fettes @stent @ffice JOHN. MARSHALL, or FOND nu Lire," WISCONSIN.

Letters Patent No. 64,7ig8, deter? fifty/,14, 1367. Y

iMPRovBD einer MAcnmB.

TO ALL WHOM-IT MAY CONCERNV: y n

Be it known that I, JOHN MARSHALL, of Fond du Luc, in the county of Fond du Lne, und Stute of Wisconsin, have invented anew and useful improvement in Presses; and I do hereby declare that the following is n full und. exa-et description thereof, reference boing had to the accompanying drawings, und to thc letters of reference marked thereon. Y Y

In ,brick-presses, especially those used for grn'vel brick, or building-blocks of large size, which require :t tremendous pressure, where the elbow-lever, joint, or knuckle-lever is employed, three very great practical difficulties are met with, ns follows: first, the difliculty of the side strain und friction ofthe plunger or follower when the elbow-levers begin the pressure, und the want of sufficient powerjust as the elbow-levers are becoming straight or finishing the stroke, and thus completing the pressure second, the diflicultyof opening the mould n ftcr such tremendous pressure, which strains and bindsA the mould cover, `especially when the lutter slides 1nto place-in grooves; third, the diiicultyof removing the brick or building-block from the mould nftcrthe latter has been uncovered, on account of the great friction between the brick or block und the sides of the mould.

The chief object of my invention is to 4overcome these difficulties, and my machine hus'been fully tested,

and found to work with remarkable success and ense. In theaccompnnying drawings- Figure 1 represents u vertical central section of my improved-brick-press.

Figure 2 is u top View of the same.

Figure 3 is an end view of the machine.

Figure 4 is a. detachedview of the mould and solid piston. v

yFigure 5 is a. detached view of the leverto start the mould cover.

Figure 6 is a view of the wedge-shape cover from the working machine,A

My invention consists, first,rin a, new arrnngement und combinntion of-lever and long connecting-rod with jointor elbow-levers for Aeasily giving an almost unlimited pressure, und avoiding en excess of side pressure und friction of the plunger or follower; second, in the use of c. wedge-shaped cover and a. peculiar lever for overcoming the friction of the cover under great strain; und, third, in the use lof u self-adjusting fulcrum und lever for removing the brick or block from the mould.

In the construction of my improved press n suitable wooden bed-frame, B, muy be placed upon the ground or other support. This bed-frame muy be ve lor sixfeet long. Upon this bed-frame is supported (by lugs or other means) a. very strong iron press-frame, A, which is provided with slots a for holding and guiding the elbow-levers F G and the cross-ber E of the follower. The upper part of this prcss-frun1e A .supports the mould I sindv the hopper C. The mould may have one or more cores 0, (varied in form and position if desired,) but in practice I find it better to omit the core altogether, und make the brick solid by means of the mould and follower or piston-head'shown in fig. 4. The mould muy be enst in one piece, but itis much better to make the same of four plates, well planed und finished, and then fastened together by bolts N outside of the side plates. The follower or plunger D is provided with e, piston-head Well. fitted to the mould, and also to the 4mould or moulds if the latter are used. In euse the piston-heed Wears so as not to fit the mould, the lutter may be reduced in size by shortening the. plates above described, so that the piston-heed will vagain fit as when new.

In order to obtain n powerful pressure I employe long lever, J, with a.' shaft or fulcrum, H, in connection with e very long connecting-rod, I, for operating the joint or elbow-levers F G. These ports are shown in black lines in their position before the stroke for pressing, und their motion is indi'cnted'by red lines. It will be observed that the connecting-rod tends to lift when its stroke commences, and et the termination of the stroke this rod :ind the lever J stond on the sume straight line, and at right angles to the levers F G, which also stand in u straight line, thus giving the press an almost unlimited power just :Ls its stroke is completed. The cover S ofthe mould is made :L little wedge-shaped, and slides into two corresponding grooves. When pushed home, the cover tightly fits `these grooves, and then, under the powerful strain of the press, is locked in position with extreme rigidity and force, so that it would be nearly impossible to start the cover from its place if'it `were not Wedge-shaped. In connection with' this wedge shape of the cover (after vurious experiments) I lhave invented a. peculiar lever, R, iig. 5, by menus of which an extraordinary purchase is obtained. By a sudden stroke or jar upon the long end of this lever R the cover may be started from the place in which it is bound .nd then, being loose, it may be easily. removed by hand.A vIn order to lift the brick from the mould, in which t is held with great force on account of the tremendous pressure and friction, I have arranged a long lever, b lpon an adjustable or swinging fulcrum or clevis, L. By this arrangement the entire lever b is rendered adjust- .ble, and thus prevented from binding as the follower D rises. The brace-rods K and other features of contruction require nofurther description. The size of the mould may be Vvaried to suit the size of the brick lesired, or for-pressing different articles to which the press is Well adapted. The thickness ofl the brick may beV 'aried in the same machine by simply raising or lowering the bearing under the levers F G'.

The general features of my press may be somewhat varied without departing from myrinvention. I do rot broadly claim thc separate devices above described, but limitmy invention to the particular combinations ind improvements set forth as different from other presses made prior to my invention. v l

Having thus fully described my invention, what I claitn, and desire t0 secure by Letters Patent of thc United States, is 4 1.' In combination with the mould, I claim the wedge-shaped cover, working in corresponding wedge-.shaped grooves, in order to bind the cover home to the inonld during-'the pressing, and then to facilitate the removal of :he cover, substantially as set forth.

2. In combination with the lever b and the follower, I claim the swinging fulcruni L, for preventing the side strain and consequent binding of the follower, substantially as described.

3. The follower D Working in the mould, in combination with the sliding cover S, and operated by the knnckle-joint lever F Gr, substantially as shown and described.

4. The lever R, provided with the hook F for releasing the cover S, sulntantially as set forth.

Y JOHN MARSHALL.

Witnesses:

Crus. E. Mansmm., O. W. Bnrr'roN. 

